Ring‐opening polymerization and depolymerization in respective polymers
Abstract
Under certain conditions the ring‐opening polymerization of cyclic monomers may be reversed to result in a ring‐closing depolymerization of the respective polymers. This method of “thermodynamic recycling” was explored for a number of examples such as polytetrahydrofuran, polyalkenamers, poly‐ε‐caprolactone, polycarbonates, polysiloxanes and respective blockcopolymers.
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Thermal depolymerization of PCL and poly(2,2-dimethyl trimethylene carbonate) can be achieved in bulk at temperature around 250 °C in the presence of a transesterification catalyst.
“For example, the thermal depolymerization of PCL and poly(2,2-dimethyl trimethylene carbonate) can be achieved in bulk at temperature around 250 °C in the presence of a transesterification catalyst.”
From Catalysis as an Enabling Science for Sustainable Polymers (2018) · cites this paper as [454]
The use of Bu2Sn(OMe)2 or NaOH facilitated a nearly quantitative depolymerization to CL, while Ti(OiPr)4 gave almost equal amounts of CL and its cyclic dimer.
“The use of Bu2Sn(OMe)2 or NaOH facilitated a nearly quantitative depolymerization to CL, while Ti(O i Pr)4 gave almost equal amounts of CL and its cyclic dimer.”
From Catalysis as an Enabling Science for Sustainable Polymers (2018) · cites this paper as [454]
Cites
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Polymerization of ε‐caprolactone with kinetic suppression of macrocycles
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Ring‐Opening Polymerization and ring‐closing depolymerization
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Chemical recycling to monomer for an ideal, circular polymer economy
Coates, G. W., & Getzler, Y. D. Y. L. (2020) · Nature Reviews Materials · doi:10.1038/s41578-020-0190-4 · Cited by 1,644 · see citing works
Catalysis as an Enabling Science for Sustainable Polymers
Zhang, X., Fevre, M., Jones, G. O., & Waymouth, R. M. (2018) · Chemical Reviews · doi:10.1021/acs.chemrev.7b00329 · Cited by 936 · see citing works
- Authors
- Höcker, H., & Keul, H.
- Affiliations
- RWTH Aachen University (DE)
- ORCID
- Keul, Helmut
- Venue
- Macromolecular Symposia
- Publisher
- Wiley
- Published
- 1995-07
- Volume
- 98
- Issue
- 1
- Pages
- 825-834
- ISSN
- 1022-1360 (ISSN-L)
- 1521-3900
- OpenAlex
- W2093133454
- Cited by
- 2
- References
- 8
- Citations by year
- 2020: 1 · 2017: 1
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Macromolecular Symposia (publishedVersion)
- RWTH Publications (RWTH Aachen) (submittedVersion)
- Topics
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
- Keywords
- ring-opening polymerization, cyclic monomers, polytetrahydrofuran, polycaprolactone, polycarbonate, polysiloxane, block copolymers, polymer recycling
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